EP1254063B1 - Structure d'amortissement de produit unitaire - Google Patents

Structure d'amortissement de produit unitaire Download PDF

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Publication number
EP1254063B1
EP1254063B1 EP01902190A EP01902190A EP1254063B1 EP 1254063 B1 EP1254063 B1 EP 1254063B1 EP 01902190 A EP01902190 A EP 01902190A EP 01902190 A EP01902190 A EP 01902190A EP 1254063 B1 EP1254063 B1 EP 1254063B1
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EP
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Prior art keywords
product
cushioning structure
unitary
walls
shock
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German (de)
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EP1254063A1 (fr
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Forrest Smith
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/02—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage
    • B65D81/05—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
    • B65D81/107—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material
    • B65D81/113—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using blocks of shock-absorbing material of a shape specially adapted to accommodate contents

Definitions

  • This invention relates to product cushioning devices for use in packaging shock sensitive products.
  • the invention relates to re-usable or recyclable product cushioning devices which are made from plastics material, and which may have several different embodiments including corner pieces, edge pieces, and end caps.
  • Each of the embodiments of the present invention comprises a unitary structure which may be molded from a plastics material using a variety of molding techniques.
  • cushioning devices for shock sensitive products has been known for many years.
  • cushioning for shock sensitive devices comprises a number of different approaches, each of which may have its own particular advantages and/or disadvantages.
  • foamed polystyrene, foamed polyurethane, foamed polypropylene, or foamed polyethylene are also well known for use as corner pieces or end caps; and very often, they are product specific in that they are particularly molded having a specific configuration for use with a particular product.
  • flexible foam cushioning devices and foamed polystyrene cushioning devices
  • foamed polystyrene cushioning devices are not recyclable. There are several reasons for that condition: The first is that flexible foam cushioning devices, and polystyrene cushioning devices, tend to be quite bulky, and are usually discarded with the packaging container in which the product has been shipped. There are very few specific recycling depots that are set up for either flexible foam or especially polystyrene cushioning devices; and, in any event, foamed polystyrene and foamed polyurethane cannot generally be recycled.
  • foamed polystyrene cushioning devices tend to be very frangible, and do not maintain their integrity very well once they have been used and removed from the packaging container in which they are shipped.
  • More elegant cushioning devices have more recently entered the market, comprising different types of blow-molded or other plastics shell products, most of which are closed structures which are filled with air or other gas. Some such structures are inflatable, some are closed, and some may be open to the atmosphere but are formed of a relatively rigid material. All such products are generally formed from high density polyethylene, which may be recycled because it is easily chopped up and made into further products, or such products may be re-usable if they are employed in a closed delivery and recovery system. Low density polyethylene may also be found in products such as those described immediately above, although its use is quite limited at the present time.
  • the present invention also provides a recyclable and re-usable product cushioning device which has a unitary construction and is formed of a plastics material.
  • the present invention provides such a product cushioning device as a tray or cover, a clamshell, an end cap, a corner piece, or an end piece.
  • the present invention does not present a closed structure, such as a number of prior art devices which are discussed hereafter; rather, the present invention provides a product cushioning device which is such that it may be stackable.
  • This feature means that product cushioning devices in keeping with the present invention may be stored in much smaller storage volumes than previously may have been required at the factory or shipping warehouse where the products in association with which the product cushioning devices of the present invention will be used.
  • the product cushioning devices may again be stacked for re-usability, or even roughly cut or chopped up for recycling of the material.
  • All embodiments of the present invention provide cushioning and shock force absorption and/or transmission, and thus shock absorbing protection, for whatever product they are being used with, in at least two of three mutually perpendicular axes for which shock absorption protection is required - vertical, front-to-back, and side-to-side.
  • shock absorbing protection for a product is provided in all three mutually perpendicular directions.
  • GOBAN United States patent No. 3,294,223 teaches a molded plastic corner piece having the configuration of a triangular polyhedron which is either rounded or flattened at its apex.
  • the purpose of the corner support is to entrap air between the molded plastic corner piece and the corner of the carton into which it is placed.
  • United States patent No. 5,226,543 teaches a packaging structure which includes both a platform portion and a sidewall portion, wherein the sidewall portion forms an enclosure around the platform portion. Essentially, this product is an end cap or platform.
  • the sidewall has both inner and outer walls which are joined by a bridge section, and the inboard wall is relatively shorter than the outboard wall such that the platform portion holds the fragile article at a specific distance above the lower edge of the outboard wall. Shock absorbing formations - typically, notches - are formed in the bridge portion of the sidewall.
  • notches have a degree of elasticity such that, when the packaging structure is loaded and then unloaded, or shocked and then unloaded, the notch will return to its original shape and can absorb multiple loads without deteriorating.
  • a material with a high degree of stiffness must be used - typically, that material is high density polyethylene.
  • the patent requires that the inboard wall is shorter than the outboard wall.
  • Another patent issued to Foos et al . is United States patent No. 5,385,232.
  • This patent also teaches a sidewall structure which forms an enclosure around a platform portion.
  • the teachings of this patent also address the issue of light shock loads that may not deform or compress the shock load formations - the notches that are discussed in the previous Foos et al . patent.
  • the concept of openings which provide for collapsibility and allow for the release of compressed air beneath the package when the package is subject to shock loading, is introduced.
  • These collapsible openings may be located in the platform at various locations, and may have a variety of shapes.
  • the teaching is directed to the use of inboard and outboard walls as well as the use of the shock formations (the notches) that have an elastic characteristic.
  • United States patent No. 5,515,976 teaches a structure which has side flanges that are adapted to contact all sides of an end portion of a fragile article, and is thus configured as an end cap. There are a number of protrusions disposed throughout the sidewalls to support the article. There is also a notch provided in the side wall as a means to absorb shock loads.
  • the end cap of this patent is also provided with at least one crush button for absorbing shocks applied along the longitudinal length of the fragile article.
  • the semi-rigid and self-supporting gas-containing bladder will retain its shape irrespective of whether it is sealed or open to the ambient surroundings; and will generally comprise a plurality of chambers in the interior of the product supporting structure with gas communication between the chambers so that the gas that is within the structure may flow from one chamber to another during shock loading circumstances of operation.
  • AZELTON et al United States patent No. 5,799,796 teaches a unitary spring system end cap packaging unit.
  • the structure includes an inner wall, an outer wall, and a spring system disposed between them.
  • the spring system includes at least one flexible harmonic bellows which forms a flexible ridge that has an arcuate shape along the length of the sidewall structure.
  • a cushioning space exists between the edge of the inner sidewall and the edge of the outer sidewall. Dimples may be provided on the inner surfaces of the sidewall to allow a friction fit of the end cap to the product over which it will be placed.
  • the arcuate harmonic bellows form flexible ridges that are elastic in nature; and each bellows of the spring system operates independently when a shock load is applied.
  • Serial No. 09/286,843, filed April 6, 1999 teaches a cushioning device which has a molded post as an integral part thereof.
  • the post is designed to extend into an intersecting corner between two perpendicular packaging container sides, or into the corner formed by three mutually perpendicular packaging container sides.
  • a product supporting surface is spaced away from a related packaging container side by a container contacting flange and a curved ridge. In a shock loading situation, the curved ridge will at least temporarily be further curved away from the post, and the product supporting surface will at least temporarily move closer to it's related packaging container side.
  • the present invention provides a product cushioning device which, in all events, is intended for supporting a shock sensitive product in an outer packaging container.
  • the present invention is applicable for use in any container which has at least parallel and planar top and bottom surfaces and at least three planar side surfaces, each of which is perpendicular to the planar top and bottom surfaces.
  • there are several embodiments of the present invention which may be configured as an end cap, a corner piece, a tray or cover, an end piece, an edge supporting piece, or in the form of a clamshell.
  • Any unitary product cushioning structure in keeping with the present invention is adapted to provide shock absorption protection for a shock sensitive product during shock loading conditions.
  • Those shock loading conditions may be in any one, two, or three of three mutually perpendicular directions - usually considered to be defined by X, Y, and Z axes.
  • the X-axis is considered to be a side-to-side axis with respect to the cushioning structure, or indeed with respect to the product.
  • the Y-axis is a front-to-back axis; and the Z-axis is a vertical axis.
  • those axes, and their orientation with respect to front, back, side, or verticality are purely arbitrary.
  • the unitary product cushioning device of the present invention is formed of a moldable resilient plastics material:
  • At least one outer container contacting wall is found in any unitary product cushioning structure in keeping with the present invention, and it provides contact with an outer packaging container in at least a first one of the three mutually perpendicular directions to be considered.
  • the unitary product cushioning structure also includes a product supporting region which has at least one outer product supporting region defining wall, at least one inner product contacting wall, at least one upper ridge between the outer product supporting region defining wall and the inner product contacting wall, and a product supporting platform extending inwardly from the inner product contacting wall.
  • the inner product contacting wall is adapted to provide shock absorption support for a product during shock loading conditions in at least one of the three mutually perpendicular directions.
  • the product supporting platform is adapted to provide shock absorption support for a product during shock loading conditions in a second direction, which second direction is perpendicular to at least the first one of the three mutually perpendicular directions, as noted immediately above.
  • the configuration of the flexible shock absorbing spring transition section is such that it is curved.
  • the direction of the curve is outwardly and away from the product supporting region defining wall which is adjacent each respective flexible shock absorbing spring transition section.
  • the unitary product cushioning structure of the present invention comprises a single outer container contacting wall, and a single outer product supporting region defining wall, together with a single inner product contacting wall and a single ridge formed between them, the unitary product cushioning structure is configured as an edge supporting piece.
  • a fairly typical configuration of the unitary product cushioning structure of the present invention is as a corner piece.
  • the cushioning structure will provide shock absorption protection for a shock sensitive product during shock loading conditions in three mutually perpendicular directions.
  • unitary product cushioning structure of the present invention which will provide shock absorption protection for a shock sensitive product during shock loading conditions, in three mutually perpendicular directions, is that which can be considered to be an end cap, a tray or cover; or, alternatively, either half of a clamshell.
  • the two pairs of outer container contacting walls are adapted to contact four walls of an outer packaging container arranged in the form of a rectangle.
  • Yet another configuration is that of an end cap, having three outer container contacting walls arranged with one opposed pair of those walls being substantially parallel to one another, and with the third outer container contacting wall being disposed between the opposed pair of walls, and perpendicular thereto.
  • the configuration is such that the three outer container contacting walls are adapted to contact the three walls of an outer packaging container, where two of the three walls of the outer packaging container are substantially parallel to one another and the third wall is disposed between the first two walls and is perpendicular thereto.
  • the outer container contacting wall or walls may be downwardly directed; while, in other embodiments of the present invention, the outer container contacting wall or walls are upwardly directed.
  • such a wall or walls has a bottom edge which provides an outer packaging container contacting surface for the cushioning structure to contact a surface of an outer packaging container in a direction aligned with the at least one outer container contacting wall.
  • Such contact is perpendicular to the at least first one of the three mutually perpendicular directions in which contact is made by the at least one outer container contacting wall.
  • an outer packaging container contacting surface is provided for the cushioning structure to contact a surface of an outer packaging container in a direction aligned with the at least one container contacting wall by at least a portion of the outer surface of the flexible shock absorbing spring transition section.
  • the outer packaging container contacting surface may be provided so as to contact a surface of an outer packaging container in a direction perpendicular to the at least first one of the three mutually perpendicular directions by which the at least one outer container contacting wall has contacted the outer container, by at least a portion of the outer surface of the flexible shock absorbing spring transition section.
  • a clamshell unitary product cushioning structure in keeping with the present invention may be provided by having two portions which each have two opposed pairs of outer container contacting walls, each associated with the respective at least one flexible shock absorbing spring transition section, and each portion having a product supporting region.
  • the two portions of the cushioning structure are bound together by a living hinge formed therebetween.
  • Some embodiments of the present invention might comprise at least two flexible shock absorbing spring transition sections between the at least one outer container contacting wall and the at least one outer product supporting region defining wall.
  • the at least one outer container contacting wall is discontinuous between each of the at least two flexible shock absorbing spring transition sections.
  • a further embodiment may provide that a portion of each of the outer product supporting region defining walls, a portion of each of the inner product contacting walls, and a portion of each of the upper ridges may be chamfered, in the region where the upper ridges intersect to define a corner of the product supporting region of the unitary product cushioning structure. Where the chamfered region is located, a web is formed between the respective outer product supporting region defining walls and the inner product contacting walls.
  • An end piece configuration of the present invention may also have two chamfered comers, where the three outer product supporting region defining walls, the inner product contacting walls, and the three upper ridges, define two respective corners of the end piece configuration.
  • a portion of each of the outer product supporting region defining walls, a portion of the inner product contacting walls, and a portion of the upper ridges, in each region where the respective pairs of upper ridges intersect, is chamfered, and a web is formed between the respective outer product supporting region defining walls and inner product contacting walls.
  • a rectangular configuration of the unitary product cushioning structure of the present invention such as an end cap or tray, for example, may have a portion of each of the outer product supporting region defining walls, of each of the inner product contacting walls, and each of the upper ridges, in each region where the respective pairs of upper ridges intersect, to be chamfered.
  • a web is formed in each of the chamfered regions between the respective outer product supporting region defining walls and the inner product contacting walls.
  • the length of the inner product contacting wall is in the range of 10% to 80% of the length of the outer product supporting region defining wall. More typically, the length of the inner product contacting wall is generally less than 60% of the length of the outer product supporting region defining wall.
  • the inner product contacting wall may have a convoluted configuration, with a plurality of ridges which extend between the product supporting platform and the upper ridge. This is to accommodate a variety of otherwise more or less similar products, as discussed hereafter.
  • the product supporting platform and the inner product contacting walls may be configured to receive a product - or a portion of a product - which has a predetermined configuration.
  • the unitary product cushioning structures of the present invention are stackable. This is achieved by molding the cushioning structures in such a manner that each outer container contacting wall, each outer product supporting region defining wall, and each inner product contacting wall, is sloped.
  • the unitary product cushioning structures of the present invention are thermoformed from sheet plastics material.
  • the compression strength of the molded unitary structure, and thereby its ability to withstand shock forces, will vary as a function of the thickness of the thermoformable sheet plastics material from which the molded unitary product cushioning structure has been thermoformed.
  • Another manner by which the ability of the unitary product cushioning structure of the present invention may be configured to withstand shock forces is by varying the width and depth of each flexible shock absorbing spring transition section formed in the molded unitary product cushioning structure.
  • outer product supporting region defining wall may be formed in a stepped configuration, so as to have a series of discrete steps.
  • a typical unitary product cushioning structure in keeping with the present invention is shown at 10 in Figure 1. It is intended for use with a product, the general outline of which is shown at 12.
  • the nature of the product 12 is immaterial to the operation and function of the present invention, except that it will be noted that the product is a shock sensitive product.
  • such products are electronic products of all sorts, such as laptop computers, computer drives, tape drives, circuit boards, etc.
  • Other products might be assembled computer cases and other assembled electronic products of all sorts, and other manufactured fragile products made of glass or ceramics, for example.
  • Each unitary product cushioning structure in keeping with the present invention will comprise at least one outer container contacting wall 20.
  • a product supporting region 16 In the outer region of the unitary product cushioning structure, there is a product supporting region 16. It is bounded at its periphery by outer product supporting region defining walls 22, inner product contacting walls 24, and upper ridges 26 formed between the outer product supporting region defining walls and the inner product contacting walls 24.
  • the lower portion (as shown in Figure 1) of the product supporting region 16 terminates in a product supporting platform 28.
  • each flexible shock absorbing spring transition section 30 has a curved configuration, with the direction of the curve being outwardly and away from the respective outer product supporting region defining wall 22.
  • Figures 2 and 3 provide an end view and a front or rear view of the embodiment of Figure 1, in particular. However, in each of Figures 2 and 3, it will be seen that the flexible shock absorbing spring transition sections 30 each extend below the bottom edge 40 of the outer container contacting walls 20, as shown at 42. Further discussion of that characteristic of certain embodiments of unitary product cushioning structures in keeping with the present invention, will be discussed in greater detail hereafter.
  • FIG. 5 and 6 Yet another embodiment of end cap, tray, or cover, is shown in Figures 5 and 6.
  • the unitary product cushioning structure may typically be thermoformed from a sheet material, so that the underside of the unitary product cushioning structure takes on an appearance such as that shown in Figure 6.
  • FIG. 7 Another typical embodiment of unitary product cushioning structure of the present invention is shown in Figures 7, 8, and 9.
  • a corner piece 50 is illustrated.
  • Two flexible shock absorbing spring transition sections 30 are shown.
  • a corner piece 50 would be placed at each of eight corners of a typical rectangular product 12, for product cushioning and shock absorbing protection when the product is placed in an outer packaging container, during shock loading conditions.
  • any unitary product cushioning structure of the present invention may be such that the flexible shock absorbing spring transition sections 30 do not extend below the bottom edge 40 of the outer container contacting walls 20, as they do in the manner illustrated previously in Figures 2 and 3. This feature will be discussed in greater detail, hereafter.
  • FIGs 10, 11, and 12 a general end piece configuration 60 illustrated.
  • the third outer container contacting wall 20 is disposed between the opposed pair, and is perpendicular to them, as can also be seen in Figures 10 and 12.
  • FIG. 13 illustrates yet another embodiment of unitary product cushioning structure in keeping with the present invention.
  • a clamshell structure 80 is provided, comprising an upper portion 82 and a lower portion 84.
  • the upper and lower portions 82 and 84 are joined together by a living hinge 87 formed between them.
  • the clamshell structure 80 is also a unitary structure.
  • each of the two halves 82, 84 each of which is substantially rectangular in configuration, has four outer container contacting walls 20; as well as a product supporting region 16 defined by four inner product contacting walls 24, four outer product supporting region defining walls 22, four upper ridges 26, and a product supporting platform 28.
  • Figure 13 also shows a shock sensitive product 83 in place in the clamshell unitary product cushioning structure 80.
  • the product 83 may be such as a network card, video card, or the like, of the sort that are typically installed in computers.
  • the product 83 may have connector block 85, if so, a region of the product supporting region 16, in the product supporting platform 28 of the upper portion 82 of the clamshell product cushioning structure 80, may be confirgured as at 86 so as to conform to9 and receive the block 85 when the unitary product cushioning clamshell structure 80 is closed.
  • the inner product contacting wall 24 may be formed having a convoluted configuration, with a plurality of ridges 90, each of which extends between the product supporting platform 28 and the upper ridge 26.
  • the purpose for the ridges 90 is that, for example, certain related models of a particular shock sensitive product may differ slightly in configuration from one model to another, and by providing a convoluted configuration of the inner product contacting walls 24, the various models of the family shock sensitive product can be accommodated.
  • various models of laptop computers might differ slightly in their configuration, depending on the specific options being provided in the respective models, but each has the general configuration and dimensions as any other laptap computer in the same family of models.
  • a flexible joint 70 which is formed between the inner product contacting wall 24 and the product supporting platform 28.
  • the flexible joint 70 is formed at the intersection of each inner product contacting wall 24 with the product supporting platform 28.
  • the flexible joint provides additional shock absorbing protection for a product 12 (or 83) when in place in the unitary product cushioning structure according to the present invention.
  • unitary product cushioning structures in keeping with the present invention may be formed in such a manner that the flexible shock absorbing spring transition section 30 is formed in at least two portions, each separated one from another by a stiffening rib 72.
  • Such structures are shown, for example, in Figures 1, 2 through 6, 10, and 12.
  • a purpose of the unitary product cushioning structure of the present invention in any embodiment, is to provide shock absorbing protection for a shock sensitive product, when placed in an outer packaging container. It has been described that any unitary product cushioning structure in keeping with the present invention is formed of a moldablc resilient plastics material.
  • unitary product cushioning structures in keeping with the present invention are thermoformed or vacuum formed, but they might in some circumstances be molded using other plastics molding techniques such as injection molding or blow molding or slush molding.
  • the unitary product cushioning structure to provide shock absorption protection in at least two of three mutually perpendicular directions. Those directions are noted, for example, in Figure 1, as being “X”, “Y”, and “Z"-axes.
  • any outer container contacting wall 20 will provide contact with an outer packaging container in at least one of the three mutually perpendicular directions - it being considered and assumed that, in all instances, the outer packaging container is essentially rectilinear in configuration.
  • An edge piece in keeping with the present invention is not specifically illustrated, but it can be determined by an examination of any of Figures 1, 4, 5, 6, 10, or 12, for example, that an edge piece would simply comprise a single outer container contacting wall 20, a single outer product supporting region defining wall 22, a single inner product contacting wall 24, a single upper ridge 26, and a product supporting platform 28.
  • such a structure comprises the defined components as discussed immediately above, and is that which is at the lower right side of the embodiment shown in Figure 1.
  • the inner product contacting wall 24 will provide shock absorption support for a product during shock loading conditions in at least one of the three mutually perpendicular directions; if the assumption is made, as discussed immediately above, that would be in the "Y"-axis.
  • the simple structure described immediately above also provides shock absorption support in a second direction, due to the presence of the product supporting platform 28. That second direction is, therefore, in the "Z"-axis, and that axis is, by definition, perpendicular to the "Y"-axis.
  • Shock absorbing protection is provided at least by the presence of the flexible shock absorbing spring transition section 30.
  • the flexible shock absorbing spring transition section 30 will momentarily collapse in a direction towards the outer container contacting wall 20. If the shock load is in the "Z"-axis, then the flexible shock absorbing spring transition section will also flex as a consequence either of the contact between it and the outer packaging container at the surface 42, as shown in Figures 2 and 3, for example; or as a consequence of the reaction between the flexible shock absorbing spring transition section 30 and the bottom surface 40 of the outer container contacting wall 20, as shown in Figure 8.
  • the present invention is adapted to provide shock absorption support for a product during shock loading conditions in at least two of the three mutually perpendicular directions, due to the inner product contacting wall 24 providing shock absorption support in one direction and the product supporting platform 28 providing shock absorption support in a second direction which is perpendicular to the first direction, as a consequence of the presence of the flexible shock absorbing spring transition section 30.
  • corner piece, end piece, end cap, shelf or cover structure, or clamshell structure will provide shock absorption protection for a shock sensitive product in all three mutually perpendicular directions.
  • the outer container contacting wall 20 is downwardly directed and has a bottom edge 40 which provides an outer packaging container contacting surface for the cushioning structure to contact a surface of an outer packaging container. That contact is, of course, in a direction which is substantially aligned with the outer container contacting wall 20, and is perpendicular to at least one of the other mutually perpendicular directions.
  • contact between a surface of an outer packaging container with the outer container contacting wall 40 might be considered in Figure 8 to be in the "Z"-axis; and that direction is perpendicular to either (or both) of the "X"-axis and "Y"-axis, in respect of which shock absorption support for the shock sensitive product during shock loading conditions is being provided by a respective inner product contacting wall 24.
  • the at least one outer container contacting wall 20 is upwardly directed.
  • the outer packaging container contacting surface is provided by at least a portion of the outer surface of the flexible spring transition section 30, in the manner as illustrated otherwise, for example in Figures 2 and 3.
  • the outer packaging container contacting surface is, indeed, provided by the portion 42 of the outer surface of the flexible shock absorbing spring transition section 30. As discussed above, contact is thereby provided for the unitary product cushioning structure of the present invention to contact a surface of an outer packaging container in a direction which is perpendicular to any of the product contacting surfaces 24.
  • each of the outer product supporting region defining walls 22, a portion of each of the inner product contacting walls 24, and a portion of each of the upper ridges 26, may be chamfered in the region where the upper ridges 26 intersect. This is shown, for example, in Figures 11 and 12, at 76.
  • a web 78 is formed between the respective outer product supporting region defining walls 22 and the inner product contacting walls 24, in the chamfered region 76.
  • the purpose of the chamfers 76 is to provide additional flexibility for the unitary product cushioning structure of the present invention, particularly when the shock load is directed towards the product supporting platform 28.
  • the product supporting platform 28 may be configured so as to receive a product having a predetermined configuration.
  • a product having a predetermined configuration is, of course, a recess 86 which is formed in the upper portion 82 of the clamshell structure 80, as shown in Figure 13.
  • any particular configuration can be provided; it being recognized that, in such circumstances, the specific unitary product cushioning structure is being manufactured for use with a specified shock sensitive product.
  • each outer container contacting wall 20, each outer product supporting region defining wall 22, and each inner product contacting wall 24, may be sloped inwardly and upwardly.
  • This feature is useful when, for example, unitary product structures of the present invention are thermoformed or otherwise molded in a factory in one location and are shipped to a customer for use with that customer's shock sensitive products which are being manufactured in another location.
  • stackability reduces shipping costs, resulting in lower prices to the shock sensitive product manufacturer, and ultimately resulting in lower prices to the end consumer of the shock sensitive product.
  • the compression strength of the molded unitary structure, and thereby its ability to withstand shock forces may vary as a function of the thickness of the thermoformable sheet plastic material, from which the molded unitary product cushioning structure has been thermoformed.
  • similar designs of unitary product cushioning structure manufactured from thermoformable sheet plastics material having an initial thickness of 0.080 inches will vary considerably from those manufactured from thermoformable sheet plastics material having an initial thickness of, for example, 0.100 inches, or 0.050 inches.
  • the decision is, of course, determined as a matter of the knowledge of the designer and of the purchaser, of the end purpose to which the unitary product cushioning structure will be put.
  • shock sensitive products having the same size but weighing two or three times as much as other shock sensitive products will require unitary product cushioning structures which are thermoformed from thicker sheet plastics materials.
  • each flexible shock absorbing spring transition section is curved, and the direction of that curve is outwardly and away from the respective outer product supporting region defining wall 22, to which it is adjacent.
  • the compression strength ofthe molded unitary structure itself, and thereby its ability to withstand shock forces may also vary as a function of the width and depth - in other words, the amount of curvature - of each flexible shock absorbing spring transition section 30.
  • the depth of the product supporting region 16 of any embodiment of unitary product cushioning structure in keeping with the present invention is determined by the height of the inner product contacting wall 24 above the product supporting platform 28.
  • the height of the inner product contacting wall 24 may be less - and, in some cases, considerably less - than the length of the outer product supporting region defining wall 22.
  • the length of the inner product contacting wall 24 is in the range of 10% to 80% of the length of the outer product supporting region defining wall 22; and, in many embodiments of the present invention, the length of the inner product contacting wall is less than 60% of the length of the product supporting region defining wall 22.
  • the elasticity of any plastics material from which the unitary product cushioning structures of the present invention are manufactured is such that there is no permanent deformation of the unitary product cushioning structures of the present invention, when they have been put to the task of absorbing shock loading so as to protect the shock sensitive product that is in them.
  • unitary product cushioning structures in keeping with the present invention drop tests on a variety of embodiments of unitary product cushioning structures in keeping with the present invention, having differing sizes and being intended for different purposes have indicated, in each instance, the ability of the unitary product cushioning structures of the present invention to meet all drop test standards. Those standards vary from case to case, depending on the product to be protected, the size and nature of the product cushioning structure, the nature of the outer packaging container, and so on. Generally, a unitary product cushioning structure in keeping with the present invention will reduce the impact forces that are imparted to the shock sensitive product being cushioned, to less than 100 g's. Typically, a level of 50 g's to 60 g's for a drop of about 1 metre is obtained by unitary product cushioning structures in keeping with the present invention.
  • the molding techniques which may be employed to manufacture unitary product cushioning structures in keeping with the present invention may include drape molding, vacuum molding, blow molding, slush molding, or injection molding.
  • thermoforming is the molding process which is employed. Any molding technique, however, which may be employed is well-known to those skilled in the plastics arts, and requires no further discussion herein.
  • Typical materials from which unitary product cushioning devices ofthe present invention may be molded include low density polyethylene, high density polyethylene, polyvinylchloride, PET, polystyrene, nylon, polypropylene, and appropriate mixtures and co-polymers thereof.
  • low density polyethylene high density polyethylene
  • polyvinylchloride PET
  • polystyrene nylon
  • polypropylene and appropriate mixtures and co-polymers thereof.
  • the above list of materials is intended to be illustrative but not exhaustive.
  • substantially when used with an adjective or adverb is intended to enhance the scope of the particular characteristic; e.g., substantially perpendicular is intended to mean perpendicular, nearly perpendicular and/or exhibiting characteristics associated with perpendicularity.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Buffer Packaging (AREA)
  • Vibration Dampers (AREA)
  • Professional, Industrial, Or Sporting Protective Garments (AREA)
  • Wrappers (AREA)

Claims (15)

  1. Structure unitaire de rembourrage de produit (10, 50, 60, 80) pour supporter un produit sensible aux chocs (12, 83) dans un contenant de conditionnement externe, ladite structure unitaire de rembourrage de produit étant réalisée à partir d'une matière plastique résiliente apte à être moulée;
       dans laquelle ladite structure unitaire de rembourrage de produit est conçue pour conférer une protection par absorption des chocs à un produit sensible aux chocs dans des conditions de charges d'impacts dans au moins deux directions parmi trois directions réciproquement perpendiculaires (32, 34, 36);
       ladite structure unitaire de rembourrage de produit étant caractérisée par:
    au moins une paroi externe (20) de mise en contact avec un contenant pour procurer un contact avec un contenant de conditionnement externe dans au moins une première direction parmi lesdites trois directions réciproquement perpendiculaires;
    une section de transition élastique flexible (30) absorbant les chocs formée à l'intérieur de ladite au moins une paroi externe de mise en contact avec un contenant, et possédant une surface externe; et
    une région de support de produit (16) possédant au moins une paroi externe (22) définissant une région de support de produit, au moins une paroi interne (24) de mise en contact avec le produit, au moins une arête supérieure (26) entre ladite paroi externe définissant la région de support de produit et ladite paroi interne de mise en contact avec le produit, et une plate-forme de support de produit (28) qui s'étend vers l'intérieur à partir de ladite paroi interne de mise en contact avec le produit;
       dans laquelle ladite section de transition élastique flexible absorbant les chocs est formée à l'intérieur de ladite paroi externe de mise en contact avec le contenant et à l'extérieur de ladite paroi externe définissant la région de support de produit;
       dans laquelle ladite paroi interne de mise en contact avec le produit est conçue pour conférer un support d'absorption des chocs à un produit dans des conditions de charges d'impacts dans au moins une desdites trois directions réciproquement perpendiculaires; et
       dans laquelle ladite plate-forme de support de produit est conçue pour conférer un support d'absorption des chocs à un produit dans des conditions de charges d'impacts dans une deuxième direction qui est perpendiculaire à au moins ladite première direction parmi lesdites trois directions réciproquement perpendiculaires.
  2. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle deux parois externes (20) de mise en contact avec le contenant sont arrangées perpendiculairement l'une à l'autre, et lesdites deux parois externes de mise en contact avec le contenant sont conçues pour entrer en contact avec deux parois d'un contenant externe de conditionnement, qui sont perpendiculaires l'une à l'autre;
       par laquelle ladite structure de rembourrage confère une protection par absorption des chocs à un produit sensible aux chocs dans des conditions de charges d'impacts, dans trois directions réciproquement perpendiculaires.
  3. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle trois parois externes (20) de mise en contact avec le contenant sont arrangées de telle sorte que les parois opposées formant une paire sont essentiellement parallèles l'une à l'autre, une troisième paroi externe de mise en contact avec le contenant étant disposée entre ladite paire de parois opposées, tout en y étant perpendiculaire;
       dans laquelle lesdites trois parois externes de mise en contact avec le contenant sont conçues pour entrer en contact avec trois parois d'un contenant de conditionnement externe, deux desdites trois parois étant essentiellement parallèles l'une à l'autre et la troisième desdites trois parois étant disposée entre les premières deux parois, tout en y étant perpendiculaire;
       par laquelle ladite structure de rembourrage confère une protection par absorption des chocs à un produit sensible aux chocs dans des conditions de charges d'impacts, dans trois directions réciproquement perpendiculaires.
  4. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle quatre parois externes (20) de mise en contact avec le contenant sont arrangées de telle sorte que l'on obtient deux paires de parois opposées, si bien que desdites paires opposées de parois externes de mise en contact avec le contenant sont essentiellement parallèles l'une à l'autre, et lesdites deux paires de parois externes de mise en contact avec le contenant sont conçues pour entrer en contact avec quatre parois d'un contenant de conditionnement externe arrangé sous la forme d'un rectangle;
       par laquelle ladite structure de rembourrage confère une protection par absorption des chocs à un produit sensible aux chocs dans des conditions de charges d'impacts, dans trois directions réciproquement perpendiculaires.
  5. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle ladite au moins une paroi externe de mise en contact avec le contenant est orientée vers le bas et possède un bord inférieur (40) qui procure une surface externe de mise en contact avec le contenant de conditionnement pour permettre à ladite structure de rembourrage d'entrer en contact avec une surface d'un contenant externe de conditionnement dans une direction de mise en alignement avec ladite au moins une paroi externe de mise en contact avec le contenant et perpendiculaire à ladite au moins première direction parmi lesdites trois directions réciproquement perpendiculaires.
  6. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle ladite au moins une paroi externe de mise en contact avec le contenant est orientée vers le haut, et
       dans laquelle on prévoit une surface externe (42) de mise en contact avec un contenant de conditionnement pour permettre à ladite structure de rembourrage d'entrer en contact avec une surface d'un contenant externe de conditionnement dans une direction de mise en alignement avec ladite au moins une paroi externe de mise en contact avec le contenant via au moins une portion de la surface externe de ladite section de transition élastique flexible absorbant les chocs.
  7. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle on prévoit une surface externe (42) de mise en contact avec un contenant de conditionnement pour permettre à ladite structure de rembourrage d'entrer en contact avec une surface d'un contenant de conditionnement externe dans une direction perpendiculaire à ladite au moins une première direction parmi lesdites trois directions réciproquement perpendiculaires via au moins une portion de la surface externe de ladite section de transition élastique flexible absorbant les chocs (30).
  8. Structure unitaire de rembourrage de produit selon la revendication 1, comprenant en outre au moins un joint flexible (70) entre ladite au moins une paroi interne de mise en contact avec le produit et ladite plate-forme de support de produit.
  9. Structure unitaire de rembourrage de produit selon la revendication 1, comprenant au moins deux sections de transition élastiques flexibles (30) d'absorption des chocs entre ladite au moins une paroi externe de mise en contact avec le contenant et ladite au moins une paroi externe définissant une région de support de produit;
       par laquelle ladite au moins une paroi externe de mise en contact avec le contenant est discontinue entre chacune desdites au moins deux sections de transition élastiques flexibles absorbant les chocs.
  10. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle ladite au moins une section de transition élastique flexible absorbant les chocs est formée dans au moins deux portions, chacune étant séparée de l'autre par une nervure de renforcement (72) s'étendant entre ladite au moins une paroi externe de mise en contact avec le contenant et ladite au moins une paroi externe définissant la région de support de produit.
  11. Structure unitaire de rembourrage de produit selon la revendication 2, dans laquelle on prévoit de deux à quatre parois externes définissant la région de support de produit, le même nombre de parois internes de mise en contact avec le produit, et le même nombre d'arêtes supérieures, tous définissant un coin, deux coins ou quatre coins, respectivement de ladite région de support de produit;
       dans laquelle une portion de chacune desdites parois externes définissant la région de support de produit, de chacune desdites parois internes de mise en contact avec le produit et de chacune desdites arêtes supérieures, dans chaque région dans laquelle lesdites arêtes supérieures se coupent, est chanfreinée (76); et
       dans laquelle une nervure (78) est formée dans chacune desdites régions chanfreinées entre les parois externes respectives définissant la région de support de produit et les parois internes de mise en contact avec le produit.
  12. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle ladite structure unitaire de rembourrage de produit est obtenue par thermoformage à partir d'une matière plastique en feuilles, et dans laquelle la résistance à la compression manifestée par la structure unitaire moulée, partant son aptitude à résister à des forces d'impacts, varie en fonction de l'épaisseur de la matière plastique thermoformable en feuilles à partir de laquelle on procède au thermoformage de la structure unitaire moulée de rembourrage de produit.
  13. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle la résistance à la compression manifestée par la structure unitaire moulée, partant sa capacité à résister à des forces d'impacts, varie en fonction de la largeur et de la profondeur de chaque section de transition élastique flexible absorbant les chocs formée dans ladite structure unitaire moulée de rembourrage de produit.
  14. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle ladite paroi interne de mise en contact avec le produit possède une configuration ondulée, plusieurs arêtes (90) s'étendant entre ladite plate-forme de support de produit et ladite arête supérieure.
  15. Structure unitaire de rembourrage de produit selon la revendication 1, dans laquelle ladite section de transition élastique flexible absorbant les chocs est courbe, la direction de ladite courbe s'étendant vers l'extérieur et à l'écart de la paroi externe respective définissant la région de support de produit.
EP01902190A 2000-01-24 2001-01-24 Structure d'amortissement de produit unitaire Expired - Lifetime EP1254063B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US490848 2000-01-24
US09/490,848 US6520337B2 (en) 2000-01-24 2000-01-24 Unitary product cushioning structure
PCT/CA2001/000081 WO2001053166A1 (fr) 2000-01-24 2001-01-24 Structure d'amortissement de produit unitaire

Publications (2)

Publication Number Publication Date
EP1254063A1 EP1254063A1 (fr) 2002-11-06
EP1254063B1 true EP1254063B1 (fr) 2003-09-17

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EP01902190A Expired - Lifetime EP1254063B1 (fr) 2000-01-24 2001-01-24 Structure d'amortissement de produit unitaire

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US (1) US6520337B2 (fr)
EP (1) EP1254063B1 (fr)
JP (1) JP5191077B2 (fr)
CN (1) CN1143801C (fr)
AT (1) ATE249984T1 (fr)
AU (1) AU2001229909A1 (fr)
CA (1) CA2404860C (fr)
DE (1) DE60100796T2 (fr)
HK (1) HK1051022A1 (fr)
WO (1) WO2001053166A1 (fr)

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Publication number Publication date
US6520337B2 (en) 2003-02-18
CN1143801C (zh) 2004-03-31
DE60100796T2 (de) 2004-08-05
CA2404860A1 (fr) 2001-07-26
WO2001053166A1 (fr) 2001-07-26
AU2001229909A1 (en) 2001-07-31
DE60100796D1 (de) 2003-10-23
CA2404860C (fr) 2008-08-12
ATE249984T1 (de) 2003-10-15
EP1254063A1 (fr) 2002-11-06
CN1411417A (zh) 2003-04-16
JP5191077B2 (ja) 2013-04-24
HK1051022A1 (en) 2003-07-18
JP2003520161A (ja) 2003-07-02
US20020023857A1 (en) 2002-02-28

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